Waxberry-like carbon@polyaniline microspheres with high-performance microwave absorption

Yu, Lujun; Zhu, Yaofeng; Fu, Yaqin

doi:10.1016/j.apsusc.2017.08.078

Cited by 84 publications

(13 citation statements)

References 39 publications

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“…One of the most common components integrated into materials systems for microwave absorption is polyaniline. [ 30–36 ] This polymer, particularly the protonated Emeraldine Salt variation due to its high conductivity, is a popular material for MAM research and development due the strong dielectric response it demonstrates when irradiated with GHz‐range electromagnetic energy. [ 15 ] For example, Liu et al embedded a graphene‐polyaniline matrix with nickel ferrite in an attempt to synergistically couple the magnetic properties of the ferrite with the dielectric nature of the matrix.…”

Section: Figurementioning

confidence: 99%

Obtaining Strong, Broadband Microwave Absorption of Polyaniline Through Data‐Driven Materials Discovery

Green

Tran

Chen

2020

Adv Materials Inter

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materials development methods do not guarantee results. Yet, the continued development of microwave absorbing materials is imperative. These materials are highly utilized in the defense [16-22] and telecommunications industries, [18,23-27] as means for reducing radar cross sections for stealth technology, [28,29] and providing electromagnetic interference shielding for the information processing and transport capabilities in electronic devices. The progression of research and development in the field of MAMs continues to accelerate, and researchers are in need of new methods for materials development and analysis. One of the most common components integrated into materials systems for microwave absorption is polyaniline. [30-36] This polymer, particularly the protonated Emeraldine Salt variation due to its high conductivity, is a popular material for MAM research and development due the strong dielectric response it demonstrates when irradiated with GHz-range electromagnetic energy. [15] For example, Liu et al. embedded a graphene-polyaniline matrix with nickel ferrite in an attempt to synergistically couple the magnetic properties of the ferrite with the dielectric nature of the matrix. This coupling resulted in a strong microwave interaction and reflection loss of −50.5 dB at 12.5 GHz, with an effective bandwidth of 5.3 GHz. [30] Wang et al. took a similar approach, imbedding a nickel-zinc ferrite into a polyaniline matrix, with a similar goal of coupling the strong dielectric action of the polyaniline material with a magnetic material. The maximal reflection loss realized by these efforts was −41 dB at 12.8 GHz and a 5 GHz effective bandwidth with a material thickness of 2.6 mm. [31] In this study, we demonstrate for the first time a data-driven process for optimizing the microwave absorbing properties of polyaniline. The final reflection loss is maximally reported as −88.54 dB with (f, d) coordinates of (7.0 GHz, 3.8 mm) 5.5 GHz with a 2.1 mm thickness. These results are record-setting for polyaniline-based materials, and the methods used to achieve these experimentally-validated results are thought to be scalable and applicable to the type of research methodologies prevalent in MAM development. As such, this type of data-driven optimization has the potential to revolutionize materials R&D for microwave absorption. The polyaniline materials were synthesized according to standard literature procedures [37] and characterized via X-ray diffraction (XRD), Fourier-transform infrared (FTIR), and Microwave absorbing materials (MAMs) are highly utilized in the defense and telecommunications industries, as means for reducing radar cross sections for stealth technology, and providing electromagnetic interference shielding for the information processing and transport capabilities in electronic devices. Polyaniline materials have attracted enormous attention in the field of MAM development due to their strong dielectric properties. In this manuscript, the strong dielectric action of polyaniline is utilized to demonstrate...

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Section: Figurementioning

confidence: 99%

Obtaining Strong, Broadband Microwave Absorption of Polyaniline Through Data‐Driven Materials Discovery

Green

Tran

Chen

2020

Adv Materials Inter

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“…CMSs can expand when heated, making them a new additive intumescent flame retardant [14]. When a composite material is burned, the CMSs can expanded to a porous structure, which can obstruct the combustible gas; thus, they have flame-resistant effects [15,16]. For example, Yaru [17] used MH@CMSs to microencapsulate PET to obtain microencapsulated CMSs coated by magnesium hydroxide flame retardants; the LOI of the composite material was enhanced to 27.4%.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Carbon Microspheres with Guanidine Phosphate and Its Application as a Flame Retardant in PET

Jiang

Zha

et al. 2020

Polymers

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Composites based on polyethylene terephthalate (PET) and surface-modified carbon microspheres (CMSs) were prepared by melt mixing. The surface modification of CMSs was conducted with low-temperature plasma technology first, and a phosphorus-nitrogen flame retardant, guanidine phosphate (GDP), was then grafted onto CMSs. The modification of CMSs was done to improve both the filler dispersity in the PET matrix and the flame-retardant performance of composites. The obtained CMSs-GDP was characterized by FTIR spectra and a scanning electron microscope (SEM). The grafting ratio was characterized and calculated by thermal gravimetric analysis (TGA). The grain size analysis was used to describe the dispersity of CMSs. The mechanical properties of the PET/CMSs-GDP composite were measured using a universal testing machine. The PET/CMSs-GDP composite can achieve a limiting oxygen index (LOI) value of 32.4% and a vertical burning test (UL94) V-0 rating at 3% CMSs-GDP loading.

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“…15 Among them, carbonaceous microwave absorbers have aroused intensive attention because of their excellent physical and chemical performances such as low density, superior electric properties, good mechanical strength, thermal stability and corrosion resistance. [16][17][18] In particular, porous carbons have large specic surface areas and can attenuate microwaves effectively by good dielectric loss, multiple reections and scattering of microwaves. [19][20][21] At present, challenges remain in the eld of microwave absorption since the effective absorption frequency bandwidth of most microwave absorbers is still unsatisfactory and the preparation technology is still complicated.…”

Section: Introductionmentioning

confidence: 99%

The effect of ZnCl₂ activation on microwave absorbing performance in walnut shell-derived nano-porous carbon

et al. 2019

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Waxberry-like carbon@polyaniline microspheres with high-performance microwave absorption

Cited by 84 publications

References 39 publications

Obtaining Strong, Broadband Microwave Absorption of Polyaniline Through Data‐Driven Materials Discovery

Obtaining Strong, Broadband Microwave Absorption of Polyaniline Through Data‐Driven Materials Discovery

Surface Modification of Carbon Microspheres with Guanidine Phosphate and Its Application as a Flame Retardant in PET

The effect of ZnCl₂ activation on microwave absorbing performance in walnut shell-derived nano-porous carbon

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Waxberry-like carbon@polyaniline microspheres with high-performance microwave absorption

Cited by 84 publications

References 39 publications

Obtaining Strong, Broadband Microwave Absorption of Polyaniline Through Data‐Driven Materials Discovery

Obtaining Strong, Broadband Microwave Absorption of Polyaniline Through Data‐Driven Materials Discovery

Surface Modification of Carbon Microspheres with Guanidine Phosphate and Its Application as a Flame Retardant in PET

The effect of ZnCl2 activation on microwave absorbing performance in walnut shell-derived nano-porous carbon

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The effect of ZnCl₂ activation on microwave absorbing performance in walnut shell-derived nano-porous carbon